Naming compounds
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Naming Compounds. Objectives: Name ionic and covalent compounds based off of chemical formulas. Give a chemical formula based on a chemical name. Oxidation Numbers. The charge of an ion # of electrons gained or lost Only in ionic compounds Cation —positive Anino --negative.

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Naming Compounds

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Naming compounds

Naming Compounds

Objectives:

Name ionic and covalent compounds based off of chemical formulas.

Give a chemical formula based on a chemical name.


Oxidation numbers

Oxidation Numbers

  • The charge of an ion

  • # of electrons gained or lost

  • Only in ionic compounds

  • Cation—positive

  • Anino--negative


How to name ionic compounds

How to name Ionic Compounds

  • Write the name of both elements, cation first

  • Change the anion’s ending to –ide

  • Write the name of the polyatomic ion

  • If an ion has various oxidation numbers (transitional metals), write the oxidation number in parentheses using roman numerals. (I, II, III, IV, V, VI, VII, VIII, IX, X)


Ionic compounds

Ionic compounds

  • NaBr

    • Sodium bromide

  • NaCl

    • Sodium chloride

  • CaCl

    • Calcium chloride

  • FeCl3

    • Iron (III) chloride


Ionic formulas

Ionic Formulas

  • Write each ion. Put cation first

  • Overall charge must equal zero.

    • If charges cancel, just write the symbols

    • If not, crisscross the charges to find subscripts

  • Use parentheses when more than one polyatomic ion is needed.

  • Roman numerals indicate the oxidation number


Give the formula

Give the Formula

  • Potassium chloride

  • Magnesium bromide

  • Copper (II) chloride

  • Calcium oxide

  • Iron (III) oxide


Common polyatomic ions

Common Polyatomic Ions

  • Ammonium

    • NH4+

  • Hydronium

    • H3O+

  • Bicarbonate

    • HCO3-

  • Cyanide

    • CN-

  • Hydrogen sulfate

    • HSO4-

  • Hydroxide

    • OH-

  • Nitrate

    • NO3-

  • Nitrite

    • NO2-


Naming compounds

More…

  • Perchlorate

    • ClO4-

  • Permanganate

    • MnO4-

  • Carbonate

    • CO32-

  • Chromate

    • CrO42-

  • Dichromate

    • Cr2O72-

  • Hydrogen phosphate

    • HPO42-

  • Sulfate

    • SO42-


Naming compounds

More…

  • Sulfite

    • SO32-

  • Thiosulfate

    • S2O32-

  • Phosphate

    • PO43-


Naming ionic compounds with polyatomic ions

Naming Ionic Compounds with Polyatomic Ions

  • Na2CO3

  • Na2SO4

  • Calcium nitrate

  • Magnesium nitrate

  • Aluminum chlorate


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